diff options
Diffstat (limited to 'lld/ELF/InputSection.cpp')
| -rw-r--r-- | lld/ELF/InputSection.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/lld/ELF/InputSection.cpp b/lld/ELF/InputSection.cpp index 09bc39eaed1..32f1f4846f7 100644 --- a/lld/ELF/InputSection.cpp +++ b/lld/ELF/InputSection.cpp @@ -618,8 +618,23 @@ static uint64_t getRelocTargetVA(RelType Type, int64_t A, uint64_t P, // statically to zero. if (Sym.isTls() && Sym.isUndefWeak()) return 0; - if (Target->TcbSize) + + // For TLS variant 1 the TCB is a fixed size, whereas for TLS variant 2 the + // TCB is on unspecified size and content. Targets that implement variant 1 + // should set TcbSize. + if (Target->TcbSize) { + // PPC64 V2 ABI has the thread pointer offset into the middle of the TLS + // storage area by TlsTpOffset for efficient addressing TCB and up to + // 4KB – 8 B of other thread library information (placed before the TCB). + // Subtracting this offset will get the address of the first TLS block. + if (Target->TlsTpOffset) + return Sym.getVA(A) - Target->TlsTpOffset; + + // If thread pointer is not offset into the middle, the first thing in the + // TLS storage area is the TCB. Add the TcbSize to get the address of the + // first TLS block. return Sym.getVA(A) + alignTo(Target->TcbSize, Out::TlsPhdr->p_align); + } return Sym.getVA(A) - Out::TlsPhdr->p_memsz; case R_RELAX_TLS_GD_TO_LE_NEG: case R_NEG_TLS: |
